Design of a multi-phase inverter for low voltage high power electric vehicles

Patzak, Adrian; Gerling, Dieter

doi:10.1109/ievc.2014.7056143

Cited by 19 publications

(6 citation statements)

References 3 publications

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“…From Figure 5 can be deduced, that the maximum relative deviation between the typical, assumed value for R DSon and the erroneous values R DSon,max and R DSon,min is 0.154 p.u.. For a set torque of less than 340 Nm, the current accuracy of R DSon -based measurement is therefore sufficient to guarantee a classification according to ASIL B. Even more, since a parallel operation of MOSFETs is planned for the application [21][17], the difference in resistances is averaged between all semiconductors.…”

Section: U Ds -Based Current-sensingmentioning

confidence: 97%

Control Strategies and Functional Safety for the Intelligent Stator Cage Drive (ISCAD)

Bachheibl

Dajaku

Patzak

et al. 2015

WEVJ

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The novel Stator Cage Drive marks a paradigm shift in electrical machine design by substituting layers of windings with stator bars that are short-circuited on one end of the machine. Those bars are individually fed from the opposite end of the machine, utilizing dedicated power electronic switches. Instead of being limited to one fixed MMF-distribution in the air gap, it is now possible to incorporate new degrees of freedom into the control strategy for such a machine, e.g. pole-switching during operation with an asynchronous rotor and the creation of selected harmonics. Compared to conventional designs of traction drives for HEVs or BEVs, this drive architecture achieves a better efficiency, both in peak operation and using common drive cycles, it is cheaper in manufacturing and it also provides better fail-safety. In order to obtain a high-quality MMF-distribution, a number of individually fed stator bars as high as 60 is preferable, which also implies a higher complexity of the control of this machine than for three-phase counterparts. If for example an induction type rotor is chosen, it is possible to vary the number of poles during operation, thus allowing the machine to always operate in the region of highest efficiency, which usually lies in the field weakening region for induction machines. An overview of the capabilities of the ISCAD-Drive is given, the applicability of well-known control methods is investigated and matters of functional safety in current measurement for a high number of phases are discussed.

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Section: U Ds -Based Current-sensingmentioning

confidence: 97%

Control Strategies and Functional Safety for the Intelligent Stator Cage Drive (ISCAD)

Bachheibl

Dajaku

Patzak

et al. 2015

WEVJ

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“…The proposed 5-phase SynRM with the new winding in this paper offers a high MMF magnitude with lower harmonics as shown in fig (8). The proposed SynRM in [31] requires a special type of power electronic converter with higher number of semiconductors switches compared to the proposed 5-phase SynRMs in this paper [32,33]. The proposed multiphase SynRM in [31] has a higher fault tolerance because of non-overlap winding and the higher number of phase (42-phase).…”

Section: B Faulty Casementioning

confidence: 98%

Performance Improvement of Existing Three Phase Synchronous Reluctance Machine: Stator Upgrading to 5-Phase With Combined Star-Pentagon Winding

et al. 2020

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This paper investigates the performance of 3-phase synchronous reluctance machines (SynRMs) when upgrading their stator to 5-phase, keeping the same rotor. The design of the 5-phase stator has been optimized to select the optimal dimensions of the slots and teeth. Moreover, a combined starpentagon winding is employed to further improve the machine performance. Different winding configurations have been studied and compared using 2D Ansys Maxwell transient simulations. It is observed that at optimal current angle and rated current, the average torque is increased by 17.41% when changing the 3-phase stator with the proposed 5-phase one. In addition, the efficiency of the 5-phase SynRM is increased by about 0.8% compared to 3-phase SynRM. At 3 times the rated speed, the torque and efficiency are significantly increased by around 33% and 3.5% respectively. Moreover, the 5-phase SynRM shows a superior performance in the faulty case with one phase opened. It works at 98.84% of the rated torque of the healthy 3-phase machine, whereas the 3-phase machine works at only 43.35% with huge torque ripple (228%). Finally, an experimental validation using the reference 3-phase machine has been done.

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“…Table-I resumes the main specifications for the investigated machine compared with the reference machine. In following, the new machine design is called as ISCAD-ASM [12,13]. To perform a correct comparison, the main geometry specifications of both machines, such as, the outer diameter, number of pole-pairs, and air-gap length are held the same.…”

Section: Exemplary Asm For Traction Applicationsmentioning

confidence: 99%

Low costs and high efficiency asynchronous machine with stator cage winding

Dajaku¹,

Gerling

2014

2014 IEEE International Electric Vehicle Conference (IEVC)

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This paper presents a new multi-phase stator cage winding suitable for different synchronous and asynchronous machine types. The new winding construction is characterized with high quality MMF distribution, simple construction, and extremely short end winding length. The stator consists of a stack of iron lamination, but with massive conductors in each slot, being short-circuited at one axial end, and with each slot conductor supplied separately at the second end of the machine. To show the capability and the efficiency of the new machine concept, an asynchronous motor (ASM) for traction application in electric vehicles (EV) is designed and investigated. The simulation results show high power density, high efficiency, and thermally robust for the new ASM design.

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Design of a multi-phase inverter for low voltage high power electric vehicles

Cited by 19 publications

References 3 publications

Control Strategies and Functional Safety for the Intelligent Stator Cage Drive (ISCAD)

Control Strategies and Functional Safety for the Intelligent Stator Cage Drive (ISCAD)

Performance Improvement of Existing Three Phase Synchronous Reluctance Machine: Stator Upgrading to 5-Phase With Combined Star-Pentagon Winding

Low costs and high efficiency asynchronous machine with stator cage winding

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